reactjs - 不变违规 : Minified React error #62

Question

我在 react 组件中编写了以下方法，一切正常

render() { return (
   <div>
      <div>
         <AppHeader x = {this.state.x} y = {this.state.y} />
         <Button id = {0} x = {this.state.x} y = {this.state.y} answerKey = {this.state.answerKey} handleClick={this.handleClick} />
         <Button id = {1} x = {this.state.x} y = {this.state.y} answerKey = {this.state.answerKey} handleClick={this.handleClick} />
         <Button id = {2} x = {this.state.x} y = {this.state.y} answerKey = {this.state.answerKey} handleClick={this.handleClick} />
         <Button id = {3} x = {this.state.x} y = {this.state.y} answerKey = {this.state.answerKey} handleClick={this.handleClick} />
      </div>
      <div>
         <ScoreBoard correct={this.state.correct} incorrect={this.state.incorrect} />
      </div>
   </div>
)}

但是 2 个 div 出现在另一个上面。我将代码更改为

render() { return (
   <div>
      <div style='float:left'>
         <AppHeader x = {this.state.x} y = {this.state.y} />
         <Button id = {0} x = {this.state.x} y = {this.state.y} answerKey = {this.state.answerKey} handleClick={this.handleClick} />
         <Button id = {1} x = {this.state.x} y = {this.state.y} answerKey = {this.state.answerKey} handleClick={this.handleClick} />
         <Button id = {2} x = {this.state.x} y = {this.state.y} answerKey = {this.state.answerKey} handleClick={this.handleClick} />
         <Button id = {3} x = {this.state.x} y = {this.state.y} answerKey = {this.state.answerKey} handleClick={this.handleClick} />
      </div>
      <div style='float:right'>
         <ScoreBoard correct={this.state.correct} incorrect={this.state.incorrect} />
      </div>
   </div>
)}

但是一旦我将样式左右放置。我收到错误

Invariant Violation: Minified React error #62; visit http://facebook.github.io/react/docs/error-decoder.html?invariant=62&args[]=%20This%20DOM%20node%20was%20rendered%20by%20%60Quiz%60. for the full message or use the non-minified dev environment for full errors and additional helpful warnings.

我根本不明白这个错误..为什么 style='float:left' 这么重要？

Answer 1

Style 需要一个 Javascript 样式对象。您提供的是一个字符串。

<div style={{float: 'right'}}>
   <ScoreBoard correct={this.state.correct} incorrect={this.state.incorrect} />
</div>

来自文档:https://reactjs.org/docs/dom-elements.html#style